diff --git a/markdown_it/rules_block/state_block.py b/markdown_it/rules_block/state_block.py
index adf6245c..b1c7bdbc 100644
--- a/markdown_it/rules_block/state_block.py
+++ b/markdown_it/rules_block/state_block.py
@@ -131,7 +131,13 @@ def isEmpty(self, line):
     def skipEmptyLines(self, from_pos):
         """."""
         while from_pos < self.lineMax:
-            if (self.bMarks[from_pos] + self.tShift[from_pos]) < self.eMarks[from_pos]:
+            try:
+                if (self.bMarks[from_pos] + self.tShift[from_pos]) < self.eMarks[
+                    from_pos
+                ]:
+                    break
+            except IndexError:
+                from_pos += 1
                 break
             from_pos += 1
         return from_pos
diff --git a/tests/test_port/fixtures/issue-fixes.md b/tests/test_port/fixtures/issue-fixes.md
index 5ff09731..562d3409 100644
--- a/tests/test_port/fixtures/issue-fixes.md
+++ b/tests/test_port/fixtures/issue-fixes.md
@@ -13,3 +13,19 @@
 <li>b</li>
 </ul>
 .
+
+#50 blank lines after block quotes
+.
+> A Block Quote
+
+> Another Block Quote
+
+
+.
+<blockquote>
+<p>A Block Quote</p>
+</blockquote>
+<blockquote>
+<p>Another Block Quote</p>
+</blockquote>
+.
diff --git a/tox.ini b/tox.ini
index f196f6e6..34ae106a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,8 +7,7 @@
 envlist = py37
 
 [testenv]
-# only recreate the environment when we use `tox -r`
-recreate = false
+usedevelop = true
 
 [testenv:py{36,37,38}]
 extras = testing